Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce25590a2c5818da…

MALICIOUS

PDF

91.4 KB Created: 2021-03-28 18:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96a8b01321be2631f276a2990d2c612e SHA-1: 2e17f6cee1d4229c6fc1563a5feae93c56f0b806 SHA-256: ce25590a2c5818da0e018286b3775cf4ed879a340f0f023f37bac6effcb30d57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though corrupted, suggests a lure related to downloading a dictionary PDF. The presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/award?keyword=dictionary+english+to+bangla+pdf+download
    • https://cdn.sqhk.co/tiruxugajo/jbAGCjc/roundup_application_rates_nz.pdf
    • https://cdn.sqhk.co/visevunu/Midhejg/tecnologias_de_la_informacion_plan_de_estudios.pdf
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6038d5e682c61.pdf
    • http://xteenware.online/how_to_prepare_chicken_for_slow_cookerblgzb.pdf
    • http://usacarins.com/28785799369vdpie.pdf
    • http://meetchambre.xyz/flowers_for_algernon_themes_and_quotess8jk7.pdf
    • https://static.s123-cdn-static.com/uploads/4487416/normal_60089c3b0d061.pdf
    • https://cdn.sqhk.co/fadejiweruw/QgdxGgi/receita_de_glace_real_para_bolo.pdf
    • https://cdn-cms.f-static.net/uploads/4496015/normal_6049d66b83cc1.pdf
    • http://registrat.space/anime_asagao_to_kase-_sanhlqkj.pdf
    • http://cmbespaceclient.xyz/black_tan_dachshund_puppieswaplq.pdf
    • https://cdn-cms.f-static.net/uploads/4407318/normal_601f7193c2852.pdf
    • https://cdn.sqhk.co/ligumorik/DBjgrha/jugojirufaridurowuresikef.pdf
    • https://cdn.sqhk.co/wepurodapike/Hua7tgj/ps4_controller_tester_android.pdf
    • https://cdn-cms.f-static.net/uploads/4426060/normal_60480d85874cb.pdf
    • https://cdn.sqhk.co/dovawowo/gjhcOjc/broken_bones_roblox_brain_damage.pdf
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601a206c9614e.pdf
    • https://cdn.sqhk.co/jogowijalaro/igiojfT/68144328804.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_6048eac972124416ae33d909e2a79cbe.pdf?index=true
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_621390603bb6448c9804486efefe296b.pdf?index=true
    • https://0978d23c-7b87-408a-b4ab-ff16da0dae51.filesusr.com/ugd/369d68_a9699c9761fb46d4a23e81efd556b665.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2f.bin
4e19ab95d9b1b16816331716c40caf4f5dec1330aa03e93f257f8fa7c6134fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2F 5748 bytes
font_01_sfnt_off0000fed3.bin
44ffad47bad1476408f2ea0472bb4252ea4c47b575e744176357b2f5c1d199ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 13068 bytes
font_02_sfnt_off00012586.bin
d4e5e6c58a45d47f68f0923bba490d51aad9a8b09035814ad50e68eb8d43c073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12586 10668 bytes
font_03_sfnt_off00014a5a.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5A 16092 bytes

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